The EPA has online pages for kids of all ages. For the younger kids there is an online section for the kids. It is the "environmental kids club". This club contains activities and games that are all educational. There are games, wordsearches, funny videos, and quizes. All provide information about things such as recycling, water, and climate change. The club also provides links to science fair project ideas and an art room.
My personal favorite is the Lose Your Excuse game. It is slightly like some of the older video games. You must use stop the excuses that are being said by jumping on to different platforms and avoiding the bad guys who are wasting materials. There are 25 levels but I had a hard time making it past level 3 :(
The EPA offers a page for teens that has games, but more importantly it offers information about careers with the EPA and links to summer internships. In addition, there is a page for teachers that has great idea for presenting the topic to their students, examples to show, and fun activities as a hand on project.
So check out http://www.loseyourexcuse.gov/index.html#/energyhouse and try out your excuse stopping moves. Can you make it passed level 3?